"They really are like a troop of actors ... and they're always moving and making little expressions," Brett said. "I said to my husband, I've learned everything I need to know about men just watching my roosters."

Brett also did detailed historical research in Russia for the setting of "Cinders," exploring and incorporating the architecture and the fashions into her book.

See five images from Jan Brett's new book below. See photos of the real-life chickens — including one with Robin Young — in the slideshow above. And to see a video of the chickens arriving at WBUR, visit Here & Now's Facebook page.

The cover of "Cinders" by Jan Brett.Cinders helps Pecky and Bossy get ready for the ball. (Click to enlarge)Pecky falls into the prince's arms at the ball. (Click to enlarge)The prince finds Cinders, his princess. (Click to enlarge)The final page of "Cinders: A Chicken Cinderella."